OnlineCBT
Biology · CELL THE UNIT OF LIFE
हिन्दीConsider the following statements regarding the cell membrane: (A) The membrane is mainly composed of lipids and proteins arranged in a bilayer. (B) Membrane proteins can be classified as integral or peripheral based on the ease of extraction. (C) The ratio of protein and lipid is rigidly fixed at 50:50 across all cell types. (D) Peripheral proteins are completely buried deep within the hydrophobic core of the bilayer. Which of the above statements are correct?
Correct answer · Option 2
(A) and (B) only
Explanation
Statements (A) and (B) are correct. Statement (C) is incorrect because the ratio varies (e.g. 52% protein, 40% lipid in RBC). Statement (D) is incorrect because peripheral proteins lie on the surface, while integral proteins are buried.
